Fuel-burner



W. O. AMSLER.

FUEL BURNER.

APPLICATION FILED JUNE I. 1918- Patented Feb. 22, 1921.

WITNESSES WALTER O. AMSLER, OF EDGEWOOD, PENNSYLVANIA.

FUEL-BURNER.

Application filed June 1, 1918. Serial No. 237,794.

T 0 all whom it may concern:

Be it known that I, \VALTER O. AiisLnn, a citizen of the United States, residing at Edgewood, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Fuel-Burners, of which the following is a specification. The prime object of my invention is to provide a new and improved fuel burner de signed to be employed for burning a. fluid fuel, as gas, a mixture of liquid and fluid fuels, as oil and gas, or pulverulent fuels, as powdered coal; and in which an induced air draft is utilized for introducing the fuel to a furnacewith a spiral or rotary motion. In the accompanying drawings, which illustrate applications of my invention,

Figure 1 is a part elevational and a part sectional view of a burner constructed in accordance with my invention;

Fig. 2 is a part plan and a part horizontal sectional view of the form of Fig. 1; and

Fig. 3, a vertical sectional view of a modified form of construction.

Referring to the drawing, and first to the form of Fig. 1, 2 designates a burner casing or hollow body preferably having the air blast inlet 3 formed integral therewith, although said nozzle may be formed separately and secured to the casing in any suitable manner;

A characteristic and important feature of the present invention resides in disposing the inner end of the air blast nozzle 3 on a tangent with the interior of the hollow body or casing, whereby'when the air is introduced to the interior of the casing it will be given a spiral'or rotary motion.

Passage of air through the nozzle and into the interior of the casing is controlled by a gate valve 1. Gate valve .4 is designed to operate in a gate frame 5. As illustrated, this frame is formed integral with the casing, constituting the body of' the burner and,

its nozzle. 6 designates a push rod for manipulating the valve. Gate valve 4 is pref erably arranged as shown, that is, in a plane inclined to the axis of the nozzle and close to the point of tangency and in a manner, when partially open, to'deflect the air thus aiding in giving the air the rotary move ment desired.

Casing 2 is provided with annular flanges 7 and 8. Flange 7 is adapted to receive a similar flange 9 of the fuel nozzle. 10 said air under pressure introduced through the nozzle 3 will enter the annular chamber 12 and will, due to the disposition of inlet end of the nozzle relatively to the said chamber, travel in said chamber 12 with a spiral or rotary movement. I The burner 6, thus far described, is particularly adapted for burning gas as a fuel. It is sometimes desirable to mix with the gas a liquid fuel, as oil, and when oil is used, the oil is introduced to the chamher or annular passage 12 through one or more ports, as 13. The burner nozzle 10 stops short of the end of the casing in order to permit the air blast to mix with the gas or the gas and oil prior to the mixture being ejected from the burner casing.

The burner structure is designed to be attached to the furnace by its flange 8, and I have found it unnecessary to employ a pipe extending from the burner into the interior'of the furnace, although a pipe may be connected with the burner and project for any desired distance into the interior of the furnace.

In the form of Fig. 3, I have shown a modified construction or,a burner particularly designed for use when powdered coal is employed as the fuel. Referring tothis modified form, 2 designates the casing having its air inlet nozzle 3' formed integral fuel at any desired angle within the furnace. I

When using gas alone or--other fluid as the fuel, suitable plugs, not shown, may be placed in the ports 13, through which the oil is introduced to the burner.

\Vhat I claim is 1. A fuel burner including a hollow casing having an air blast nozzle formed integral therewith, a fuel nozzle within and disposed concentrically of the" casing to form an elongated annular chamber between the fuel nozzle and the interior wall of the casing, said air blast nozzle arranged tangentially to the longitudinal axis of the hollow casing to produce a spiral movement of the air and fuel within the casing and as the mixture is ejected therefrom. r

2. A fuel burner including a hollow casing, a nozzle for air inc'ommunication with the interior of the casing, a fuel nozzle within and disposed concentrically of the casing to form an elongated annular chamber between the fuel nozzle and the interior wall of the casing, said air blast nozzle arranged tangentially to the longitudinal axis of the hollow casing to produce a spiral movement of the air and fuel within the casing and as the mixture is ejected therefrom.

3. A fuel burner including a hollow casing having a flange at one end and formed with an air blast nozzle, a flanged fuel nozzle having its flange seated upon the flange of the casing and its body disposed within and concentrically of the casing, said air blast nozzle arranged tangentially .to the interior of the hollow casing.

In testimony whereof I aflix my signature in presence of two witnesses.

WALTER O. AMSLER.

lVitnesses:

J. M. GEoGHEoAN, Lois W INEMAN. 

